Territoby



(No Model.)

T. H. LUCAS.

' GRATE.

. 'Patented May 15,1883. y

/NVETOH UNITED STATES"i PArENr` QFFICE.

THOMAS H. LUCAS, 0F VALLEY CITY, DAKOTATERRITOY.'

. G RATE.

A. y sPEcIFIcAT'lIN forming part of Letters Pageant Na. 2772754, dated May-15, 1883.

l I' Application eigenaren 3,1ses.-(No mausi.)

To allwhom 'it may concern Be it `known that 1, THOMAS `ELLUGAS, of

Valley City, in the county ritory of Dakota, have invented certain new 5' and useful Improvements do hereby of Barnes and Ter- K in Grates; and. I

` declare the following to be a full, clear, andexact description of the invention,

such as will enable .others sk'illed in the art to `wl1ich it appertains to mak e and use the same.

n My invention relates to an 'improvement in grates more particularly adapted for burning lignite,or the soft coals tofore 'the great diicultye n'omically defective of thcNorthwest. Herencountered in eco-V utilizingthe softer coals consisted in 4grates, which were so constructed as to allow the particles of coal to'fall through as .the lumps crumbledor becamedecomposed and also from their shapeallowed the inass to settle. dow-n solidly thereon, free ingress of`air.`

hich `prevcn ted the` Lignite in burning pro duces a large amount .of ashes, and it has been lfound practically impossible to remove them from the grates now in use without removingthe fnerparticles of unconsumed coal formed by the crumbling of the lumps when the latter are exposed to the heat; andthe object of my present inventi grate capable of' holding the coal while burn-Y ing,and with pockets or receptacles, into which y finer particles of coal fall. 'A

the ashes and further object is to provide ing air to the burning pockets. A further object whereby the Aashes and fin that have pockets; and with'these e onis to provideca means for supplyfuel in and above the isto providemeans er particlesof fuel vention cousistsin the parts and combinations of parts, as will be more pointed out iu the claims.

f In the accompanying a view in frontelevation of as applied to a stove. i Fig. with the face-plate removed fully described, and

drawi'ngs, '}3f-ligure1 is my improved grate 2is a similar view Fig. 3 is a trans `Versevertical sectional view. Fig. 4 isa detached perspective view of a section of the grate, and Fig. 5 is a perspectivel view of the sievel or shaker.

AV represents a stove of any desired/"design or construction,.and the grate formed in one or morepieces and secure :fr within a furnace iu an d within the stove y desired manner.

vtrance of air. below ,inch and a quarter position a series of.' pockets, a., is formed, into which the ashes andner particles of fuel fall. The grate is preferably made in sections. cachot' which is V-'shaped This grate 'is preferablyy made of' castrmetal,`

and when secured iu in cross-section, the side edges of the said sec- The pper ends or apices b, of the sections or gra -bars are all in the andare, preferably, their upper ends, or larger pieces of lignite above the pockets, so as to enable the Baines `around `Nieul-,aud also to allow ofthe free-em `the linups, thereby facili- Each pocketisl about one deep,l and is provided at same horizontal plane, about two inches apart at;

tating combustion.

its :lowest point with perforationsthrough which the ashes pass when the shaker or sieve is moved. The sides and top of the grate-bars-are provided with numerous perforations.. for the entrance of air, and hy'contin-uing thepeforations to the so as to support the dumps` and heatto play a slot'or with a series ot' e to'prof the grate-bars perfect combustion is obtained until the pockets orfreceptacles are completely filled with ashes, which-latter can then be .removed by the shakerfolr sieve C.

This'shaker or sieve` one piece ofrnctal; ment isapplied to large furnaces it will be C is preferably made oi' his shaker rests close up underthe gratebars', and is provided with a number of slots or perforations, which come immediately un- 'de'r the' oblong-slot in the lower e'nds of the pockets or receptacles,

and is also provided found convenient to .make them in'sections., fallen into the pockets are removed jT but when my improve` with large openings c between each set of perforations d, tofenable the line ashes which drop through from the top 'and sides of the pockets to fall 'at once into the ashpan. This shaker C is Supported in any suitable manner, and-iu the present instance is adapted` to be moved backward and forward; but it can, without materially altering' the relative arrangement of parts be moved en'dwiseor partly rotated and lperformits function in a Vsatisfactory manner. A llhedirection of movement of the shaker, however, is' largely dependent on the shape of the stove.

The face-plate C' is made in a separate piece', changes and alterations as' fairly fallywithin fthe spirit and' scopevof my invention.

and is adapted to cover and protect the outer ends of the grate-bars, 'and is provided near its lower edge with a series of perfor-ations, e,

which latter open int-o the `pockets a, for the purposeof increasingthedraft. Disan air-line situated between the rearplate, E,and plate F. This liiue extends down even with the bottom ot' the grate-bars, and upward about 'or slightly above a level of the fuel. The draftof this iue is regulated by the shaker or sieve C, the inner end of which is adapted to move 'under the iine more ory less andwholly or f partly close it, to increaseor decrease the draft,

as circumstances demand. The secondary current vof air which passes up this-rear iue is discharged above the burning fuel, and in-V creases the combustion by supplying oxygen to the gases 'set free by the combustion of the.

coal.

4To remove the ashes which have settled into the pockets it isI simply necessary to agitate the shakerior sieve, which movement is suicient to loosen them and cause-them to fall through the perforations therein.

The grate-bars, instead vof being made `V- shaped, as described, can be cast iii one continuous piece, or they can be formed'of fiat perforated bars `of metal placed in inclined positions and heldjin place by-iianges on the fronti and rear plates, B and F.

I'have described myimprovement`1n connection with a simple cooking-stove,bnt it is equally-well adapted for all stoves and furnac'es in which lignite is burned. L

It is evident that slight changes in the construction .and relative arrangement of parts might be resorted to without departing from the spirit of my invention; and hence I .would haveit understood that 1 do not limitin'yself to the exact construction shown and described,

bufconsider myself at.liberty to make such Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, withia stationary grate,`

the perforated' sections" composin the same being shaped and arranged,substantiallyas described, so as to form ash-pockets, of a shaker situated close up under the grate, substan; tially as set'forth. v 1

f 2. lhe oombinatiom-'withastationary grate th'e sections of which are shaped and arranged,

substantially as described, so as to'form'as'hpockets, the sides and bottoms of said pockets being perforated, of a perforated shaker situated close up underv theI grate, substantiallyas set forth.

3. The combination, with astationary grate composed of a series of perforated VY-shaped sections arranged side by side, forming a series of V-shaped pockets, .of ashaker situated vclose up -under'the grate, substantially as set e forth. v 4. The combination, `with a stationary, grate `composed of V-shaped sections arranged side yby side, forming a series of V-shapedpockets',

and a face-plate provided with perforations opening into the pockets, of a movable shaker situated yclofse up under the grate, snbstau.-

tially as set forth. f'

y 5. Thecembination,with'theplate C', plate@ E, and intermediate grate, of the rear plate, F, forming the ue 1), and a shaker situated close up.under the grate,'substantially as set forth.

In testimony whereof I; have signed this specification in the presence of two subscribing- .'rHoMAsH-...LUoAs l witnesses;

Witnesses;

GEo. F. DOWNING, Gnaoaeiir CooK. 

